Sounds like something you'd forget in 3 weeks after the course! Clearly it's a crash course and I would presume the emphasis would be to pass the tests while get as much flying done as possible. In such a manner you'd mostly be studying for the exams and I've always found this method to be the most effective way to forget everything studied shortly after.
I did my PPL ground school in 7 weeks. Still logging my flight hours though.
A.O.